Rust

Get Container Metadata

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Sample code to get the user-defined metadata of a container. Rust

// Azure Blob Service Example: Get Container User-Defined Metadata
// See also: https://msdn.microsoft.com/en-us/library/azure/ee691976.aspx

// This example requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

let rest = chilkat::Rest::new();

// Connect to the Azure Storage Blob Service
let b_tls = true;
let port = 443;
let b_auto_reconnect = true;
// In this example, the storage account name is "chilkat".
if rest.connect("chilkat.blob.core.windows.net", port, b_tls, b_auto_reconnect).is_err() {
    println!("{}", rest.last_error_text());
    return;
}

// Provide Azure Cloud credentials for the REST call.
let az_auth = chilkat::AuthAzureStorage::new();
az_auth.set_access_key("AZURE_ACCESS_KEY");
// The account name used here should match the 1st part of the domain passed in the call to Connect (above).
az_auth.set_account("chilkat");
az_auth.set_scheme("SharedKey");
az_auth.set_service("Blob");
// This causes the "x-ms-version: 2021-08-06" header to be automatically added.
az_auth.set_x_ms_version("2021-08-06");
let _ = rest.set_auth_azure_storage(&az_auth).is_ok();

// Note: The application does not need to explicitly set the following
// headers: x-ms-date, Authorization.  These headers
// are automatically set by Chilkat.

// The expected success response is a 200 response status code with no response body.
// In this example, we are getting the metadata of the container named "mycontainer".
let Ok(response_str) = rest.full_request_no_body("GET", "/mycontainer?restype=container&comp=metadata") else {
    println!("{}", rest.last_error_text());
    return;
};

// When successful, the Azure Storage service will respond with a 200 response status code,
// with no response body.

if rest.response_status_code() != 200 {
    // Examine the request/response to see what happened.
    println!("response status code = {}", rest.response_status_code());
    println!("response status text = {}", rest.response_status_text());
    println!("response header: {}", rest.response_header());
    println!("response body (if any): {}", response_str);
    println!("---");
    println!("LastRequestStartLine: {}", rest.last_request_start_line());
    println!("LastRequestHeader: {}", rest.last_request_header());
    return;
}

// The user-defined metadata is located in the response header.
// The full response header can be obtained like this:
println!("response header: {}", rest.response_header());
println!("--");

// Metadata headers begin with "x-ms-meta-"
// Individual response header fields can be retrieved like this:
println!("x-ms-meta-Category: {}", rest.response_hdr_by_name("x-ms-meta-Category").unwrap_or_default());
println!("x-ms-meta-Resolution: {}", rest.response_hdr_by_name("x-ms-meta-Resolution").unwrap_or_default());

println!("Success.");